Startle reaction

Draw resonance structures showing all the positions at which the positive charge is delocalized on the aromatic ring in the phenonium ion. If a methoxy group (-OCH3) or a nitro group (–NO2) were substituted in the 4-position on the aromatic ring, how would the stability of the phenonium ion change? Compare methoxy substituted, nitro substituted and unsubstituted, and order them by increasing stability. Explain your answer thoroughly. 2) Benzopinacol and benzopinacolone have nearly…

Imagine trying to figure out one possible combination to a mixture, when there are over 100 possibilities. The 8th graders had to look at the physical and chemical properties, to somehow figure out the mixture. A group of students thinks that Baking Soda and Citric Acid is what’s in the mystery mixture. That group thinks that Baking Soda and Citric Acid is in it for a lot of reasons. One reason is that the mystery mixture has circular round objects in it and the Citric Acid is circular and…

revolve around chemical reactions. Without the presence of enzymes some of life's processes would not happen easily. An enzyme is a macromolecule serving as a catalyst, they are generally a protein based molecule, as it is in the lab, Enzymes are organic catalysts that control the rate of chemical reactions in cells while not being permanently changed or without being consumed, which makes enzymes different from other proteins. In general, enzymes speed up the rate of reactions by lowering the…

knowledge and understanding of enzymes is imperative. The first part of this experiment deals primarily with PTU and catechol oxidase. Enzymes work by using substrates (reactor molecules) to increase the chances of a reaction taking place. Enzymes are not used or changed during a reaction, they simply bind with the substrate at the active site. This creates the place where catalysis actually occurs, called the enzyme-substrate complex (Freeman). Catechol Oxidase is the enzyme extracted from…

called the Grignard Reaction lab. The purpose of this lab was to perform the Grignard reaction and to obtain the final product triphenylmethanol from a halide, phenylmagnesium bromide and the starting material, methyl benzoate along with the Grignard reagent. Bromobenzene, magnesium turnings, and anhydrous ether were needed to form the Grignard reagent. To synthesize the reagent, react the reagent with methyl benzoate to form a tertiary alcohol. The objective of the Grignard Reaction lab was to…

percent yield of the esterification reaction used to produce aspirin. This reaction was catalyzed by concentrated H2SO4, but since it is not consumed during the reaction, it does not affect the stoichiometric calculations. In order to determine the limiting reagent, the moles of reactants were calculated (Part A). Part B of the calculations illustrates the amount of aspirin produced by each reactant based on 1:1 mole ratio defined by the balanced equation of the reaction. According to these…

chemical reactions to take place much quicker than reactions would occur on their own. Enzymes function as catalyst, which means they speed up reactions by providing an alternative reaction pathway of lower activation energy (cite). Each step of a pathway typically requires a specific enzyme, without the specific enzyme, the pathway can not be completed. In addition, enzymes do not undergo permanent reactions and remain unchanged by the end of the reaction. Enzymes catalyze chemical reactions…

ssment Page 42 1. Two categories that are used to classify properties of matter are extensive and intensive. 2. All samples of a given substance have the same intensive properties because every sample has the same composition. 3. The three states of matter are solids, liquids, and gases. 4. Physical changes are grouped into two categories known as reversible and irreversible. Reversible changes are changes from one state to another. Irreversible changes are changes that cannot change from one…

dissolves in a reaction of: CaCl2 Ca2+aq + 2Cl1-aq while NH4NO3 dissolve in a reaction of: NH4NO3 NH41+aq + NO31-aq . As shown in these reactions, when ionic compounds dissolve in water, they break into their individual charged ions. The compounds are held together through ionic bonds, but when they dissolve, ionic bonds are broken and ion dipole attractions form instead. This change in bonding indicates that there is a change in energy, which can create endothermic or exothermic reactions.…

The purpose of the whole lab is to use my knowledge of the periodic table to determine the identity and physical properties of each unknown element. To find the unknown elements we looked at the characteristics of the other elements and grouped the ones that were similar and belonged in the same column. By looking at the characteristics of the unknown elements if it seemed to belong in a group with others with a blank we assumed it belonged there. Mendeleev was a scientist who came up with the…